List at least three differences in how the E. coli and human genomes are arranged
What will be an ideal response?
The E. coli genome consists of one circular chromosome, whereas the human genome is composed of
many linear chromosomes. The human genome contains many more nucleotides and protein-coding
genes than the genome of E. coli. Despite that, only about 1.2% of the human genome is coding,
whereas nearly 90% of the E. coli genome is coding. Finally, each human gene contains eight introns
on average, but E. coli genes do not contain introns at all.
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RNA catalysis was discovered by Thomas Cech and his coworkers when the experimental control tube with only RNA and no protein showed enzymatic activity. This discovery would most likely be described as:
A. model building and calculation. B. exploration and observation C. inspiration. D. serendipity.
Gene flow counters the effects of
a. natural selection. b. mutation. c. genetic drift. d. all of these. e. none of these.
A flower forms from
a. an ovary tissue that migrates from the root. b. stem cells that form tumor like growths. c. impregnated pollen grains. d. a modified branch called a receptacle. e. bark tissue.
Proximate causes of behavior have evolutionary explanations
____________________ Indicate whether the statement is true or false.